.eslintrc.js

module.exports = {
  root: true,
  parser: '@typescript-eslint/parser',
  plugins: ['@typescript-eslint/eslint-plugin'],
  extends: ['eslint:recommended'],

  rules: {
    'no-var': 'error',
    'object-curly-spacing': ['error', 'always'],
    'object-shorthand': 'error',
    'prefer-const': 'error',
    'max-len': 'off',
  },

  overrides: [
    {
      files: ['**/*.ts'],
      extends: [
        'eslint:recommended',
        'plugin:@typescript-eslint/recommended',
        'plugin:@typescript-eslint/recommended-requiring-type-checking',
      ],
      parser: '@typescript-eslint/parser',
      plugins: ['@typescript-eslint'],
      parserOptions: {
        tsconfigRootDir: __dirname,
        project: ['./tsconfig.json'],
      },
      rules: {
        '@typescript-eslint/no-explicit-any': 'off',
        '@typescript-eslint/strict-boolean-expressions': 'off',
        '@typescript-eslint/no-unsafe-call': 'off',
        '@typescript-eslint/no-unsafe-member-access': 'off',
        '@typescript-eslint/no-unsafe-assignment': 'off',
        '@typescript-eslint/explicit-module-boundary-types': 'off',
        '@typescript-eslint/no-unsafe-return': 'off',
        '@typescript-eslint/no-empty-interface': 'off',
        '@typescript-eslint/no-non-null-assertion': 'off',
      },
    },
  ],

  env: {
    es6: true,
    mocha: true,
    node: true,
  },
}